Ionia Weather Forecast

    • 67
    • 83

    Rain Showers Likely

    • 65
    • 83

    Chance Thunderstorms

    • 65
    • 81

    Slight Chance Thunderstorms

    • 65
    • 83

    Rain Showers Likely

    • 62
    • 78

    Rain Showers Likely

    • 60
    • 78

    Chance Rain Showers

Today 7 Aug Ontario

Mostly sunny this Morning, then partly sunny with a chance of Showers and Thunderstorms early this afternoon. Mostly cloudy with Showers likely with a chance of Thunderstorms late. Highs Ranging from the upper 70s on the Hilltops to the mid 80s across the lower Elevations. Light Winds. Chance of rain 70 percent.

Tonight 7 Aug Ontario

Mostly cloudy. Showers likely with a chance of Thunderstorms in the evening. Muggy with Lows in the upper 60s. Light Winds. Chance of rain 60 percent.

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  • Temperature Real-Time

Ionia Temperature Statistics

August Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 4 August, 2026

    57 °F

  • Average August

    72.1 °F

  • Highest 1 August, 2026

    85.6 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.6 °F
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